The Pendragon RPG has consistently been rated as one of the top roleplaying campaigns of all time (see for example this post on Reddit, and this post).
The Pendragon Campaign is structured with the same multi-year, multi-generational campaign composed of numerous ‘one page’ style adventures that the Mirkwood Campaign is, and our game club has really enjoyed that format. In particular, this format makes for a great structure to do co-GMing, a big plus for our group since we have multiple GMs which we rotate through.
Now it appears that they are working on a new edition. This one is going to be produced by Chaosium. I’ve been consistently impressed with Chaosium products now that they are under new management, so I am very much looking forward to this new edition. Hopefully one day I’ll get to run or play it!